So, looking at the docs and this presentation from Christopher Schultz: https://tomcat.apache.org/presentations/2019-09-10-acna-Let's%20Encrypt%20Apache%20Tomcat.pdf <https://tomcat.apache.org/presentations/2019-09-10-acna-Let's%20Encrypt%20Apache%20Tomcat.pdf> The "getting the certificate" part is easy but the updating the keystore looks like the challenge.  Easiest way, and most secure, is to put it behind a reverse proxy like Apache which already accommodates ACME script tools like certbot.

If a reverse proxy isn't an option, I am guessing, based on the brief reading I did, that you could use certbot to get a cert and then write a script to handle the OpenSSL.  That is actually the conclusion that Chris came up with in the presentation but the complete script isn't presented. I bet you could ask him for it on the Apache Tomcat list that I know you are already a subscriber on.

But it applies to Letsencrypt which may not be the CA you are working with.

Pete Helgren
www.petesworkshop.com
CISSP - MSCM
GIAC Cloud Penetration Tester
AWS Certified Cloud Practitioner
Microsoft Certified: Azure Fundamentals

On 4/2/2026 10:39 AM, James H. H. Lampert via MIDRANGE-L wrote:
What it says on the tin: has anybody come up with a solution for certificate renewal automation that will run on a Midrange box, that's compatible with Tomcat servers?

--
JHHL

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